Here's an actual graph of measured loading across each pitch/stage. Some specific applications can run relatively high visc. fluid, however not on the order of 4500 cP.
Thank you everyone for your input. I'm not an engineer so I came to the experts for some assistance, and it is much appreciated.
the application is in a harsh environment (solids/abrasives/temperature/high torque requirements) and it also restricted diametrically. So the PC pump is the best...
The application is actually to use the pump as a motor. Fluid is forced through the PCP to create rotation of the rotor, instead of mechanically driving the rotor to move the media. So the pressure equalization would provide a wider power band and thus more power output.
The Caveman approach...
I have read in several studies that a multi-stage progressing cavity pump does not equally share the differential loading. The work done by the first couple of stages is virtually zero, and then the remaining couple increases exponentially. It is almost to the point it is ridiculous to spend...
